Pain medicine : the official journal of the American Academy of Pain Medicine
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Randomized Controlled Trial
Heart rate variability parameters do not correlate with pain intensity in healthy volunteers.
When patients cannot indicate pain, physiological parameters may be useful. We tested whether heart rate variability (HRV) parameters, as reflection of sympathetic and vagal tone, can be used to quantify pain intensity. ⋯ HRV parameters may detect responses to heat pain, but are not suitable to assess pain intensity.
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To compare the pharmacodynamic effects, including self-reports of "drug liking" and "high," of crushed morphine sulfate and naltrexone hydrochloride extended-release capsules (MSN), crushed morphine sulfate controlled-release (CR) tablets, and placebo in an abuse potential study. ⋯ This study demonstrated that when crushed and administered orally to nondependent recreational opioid users, MSN was associated with significantly lower scores on all positive subjective measures including drug liking and high, and significantly less pupil constriction compared with crushed morphine sulfate CR.
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Randomized Controlled Trial Comparative Study
A phase 3, randomized, double-blind comparison of analgesic efficacy and tolerability of Q8003 vs oxycodone or morphine for moderate-to-severe postoperative pain following bunionectomy surgery.
Compare the efficacy and tolerability of the dual-opioid, Q8003(®) (morphine/oxycodone combination) 12 mg/8 mg to morphine 12 mg or oxycodone 8 mg in subjects following bunionectomy surgery. ⋯ Q8003 provided superior efficacy to its individual components at twice the MED with only a modest increase in the incidence of adverse events.
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Randomized Controlled Trial Observational Study
The effects of thoracic epidurally administered drugs on urethral sphincter function in women: a pooled analysis.
Thoracic epidural analgesia (TEA) has been shown to inhibit detrusor activity in patients undergoing open renal surgery, resulting in clinically relevant post-void residuals. However, the impact of different epidural drug mixtures on urethral sphincter function is not completely elucidated. ⋯ TEA with bupivacaine and the addition of fentanyl and epinephrine appears to decrease maximum urethral closure pressure at rest in women. The addition of fentanyl alone to bupivacaine may reduce this effect. Thus, the TEA effect on urethral sphincter function seems to depend on the drug mixture administered.